Two-way viewing angle display panel and method for fabricating the same

Abstract

A two-way viewing angle display pane and a method for fabricating the same are provided and relate to the display field. The method for fabricating the two-way viewing angle display panel comprises: providing a transparent substrate ( 17 ); forming a grating ( 18 ) made of a light-shield layer on the transparent substrate; forming a transparent adjusting layer ( 19 ) on the transparent substrate ( 17 ) having the grating ( 18 ) formed thereon; and sequentially forming a pixel layer ( 13 ) and a transparent conductive layer ( 20 ) on the transparent adjusting layer ( 19 ). The technical solution of the invention may optimize the two-way viewing angles and avoid the yield rate problem caused by the thinned substrate.

What is claimed is: 
     
       1. A method for fabricating a two-way viewing angle display panel, comprising:
 providing a transparent substrate; 
 forming a grating made of a light-shield layer on the transparent substrate; 
 forming a transparent adjusting layer on the transparent substrate having the grating formed thereon; and 
 sequentially forming a pixel layer and a transparent conductive layer on the transparent adjusting layer; 
 wherein the step of forming a grating made of a light-shield layer on the transparent substrate comprises: 
 forming alignment marks for the grating and the pixel layer on the substrate at the same time by using the same mask plate. 
 
     
     
       2. The method for fabricating a two-way viewing angle display panel of  claim 1 , wherein the light-shield layer is a black metal layer, or an organic material layer, or a laminated layer made of an organic material and a reflective material. 
     
     
       3. The method for fabricating a two-way viewing angle display panel of  claim 1 , wherein the step of forming a transparent adjusting layer on the transparent substrate having the grating formed thereon comprises:
 blade or spin coating a transparent material on the transparent substrate having the grating formed thereon and then thermally curing the transparent material to form the transparent adjusting layer; or 
 blade or spin coating a transparent material on the transparent substrate having the grating formed thereon and then UV curing the transparent material to form the transparent adjusting layer; or 
 blade or spin coating a transparent material on the transparent substrate having the grating formed thereon and then UV pre-curing, followed by thermally curing the transparent material to form the transparent adjusting layer; or 
 depositing a non-metal transparent material on the transparent substrate having the grating formed thereon using CVD process to form the transparent adjusting layer; or 
 depositing a transparent metal material on the transparent substrate having the grating formed thereon using sputtering process to form the transparent adjusting layer. 
 
     
     
       4. The method for fabricating a two-way viewing angle display panel of  claim 1 , wherein a thickness of the transparent adjusting layer is 0-500 μm. 
     
     
       5. The method for fabricating a two-way viewing angle display panel of  claim 1 , further comprises the following steps before forming the transparent adjusting layer on the transparent substrate having the grating formed thereon:
 obtaining a width of a sub-pixel of the pixel layer and a aperture size of the grating; 
 determining the thickness of the transparent adjusting layer according to the width of a sub-pixel and the aperture size. 
 
     
     
       6. The method for fabricating a two-way viewing angle display panel of  claim 5 , wherein a distance between the grating and the pixel layer, that is, the thickness h of the transparent adjusting layer, is determined according to the following equation:
     h= ½√{square root over (( a−m )( Ps+m−a ))}{square root over (( a−m )( Ps+m−a ))};
 
 where each sub-pixel of the pixel layer is made of a color filter element and a black matrix, the black matrix has a width of m, the color filter element has a width of p, each sub-pixel has a width of Ps=p+m, and the aperture size of the grating is a. 
 
     
     
       7. The method for fabricating a two-way viewing angle display panel of  claim 6 , wherein h=Ps/4. 
     
     
       8. A two-way viewing angle display panel comprising:
 a transparent substrate; 
 a grating made of a light-shield layer on the transparent substrate; 
 a transparent adjusting layer on the transparent substrate having the grating formed thereon; and 
 a pixel layer and a transparent conductive layer on the transparent adjusting layer, 
 wherein a distance between the grating and the pixel layer, that is, a thickness of the transparent adjusting layer, is:
     h= ½√{square root over (( a−m )( Ps+m−a ))}{square root over (( a−m )( Ps+m−a ))};—
 
 
 where each sub-pixel of the pixel layer is made of a color filter element and a black matrix, the black matrix has a width of m, the color filter element has a width of p, each sub-pixel has a width of Ps=p+m, and the aperture size of the grating is a. 
 
     
     
       9. The method for fabricating a two-way viewing angle display panel of  claim 2 , wherein the step of forming a transparent adjusting layer on the transparent substrate having the grating formed thereon comprises:
 blade or spin coating a transparent material on the transparent substrate having the grating formed thereon and then thermally curing the transparent material to form the transparent adjusting layer; or 
 blade or spin coating a transparent material on the transparent substrate having the grating formed thereon and then UV curing the transparent material to form the transparent adjusting layer; or 
 blade or spin coating a transparent material on the transparent substrate having the grating formed thereon and then UV pre-curing, followed by thermally curing the transparent material to form the transparent adjusting layer; or 
 depositing a non-metal transparent material on the transparent substrate having the grating formed thereon using CVD process to form the transparent adjusting layer; or 
 depositing a transparent metal material on the transparent substrate having the grating formed thereon using sputtering process to form the transparent adjusting layer. 
 
     
     
       10. The method for fabricating a two-way viewing angle display panel of  claim 2 , wherein a thickness of the transparent adjusting layer is 0-500 μm. 
     
     
       11. The method for fabricating a two-way viewing angle display panel of  claim 3 , wherein a thickness of the transparent adjusting layer is 0-500 μm. 
     
     
       12. The method for fabricating a two-way viewing angle display panel of  claim 2 , further comprises the following steps before forming the transparent adjusting layer on the transparent substrate having the grating formed thereon:
 obtaining a width of a sub-pixel of the pixel layer and a aperture size of the grating; 
 determining the thickness of the transparent adjusting layer according to the width of a sub-pixel and the aperture size. 
 
     
     
       13. The method for fabricating a two-way viewing angle display panel of  claim 3 , further comprises the following steps before forming the transparent adjusting layer on the transparent substrate having the grating formed thereon:
 obtaining a width of a sub-pixel of the pixel layer and a aperture size of the grating; 
 determining the thickness of the transparent adjusting layer according to the width of a sub-pixel and the aperture size. 
 
     
     
       14. The method for fabricating a two-way viewing angle display panel of  claim 4 , further comprises the following steps before forming the transparent adjusting layer on the transparent substrate having the grating formed thereon:
 obtaining a width of a sub-pixel of the pixel layer and a aperture size of the grating; 
 determining the thickness of the transparent adjusting layer according to the width of a sub-pixel and the aperture size.